A Cuban national freed from prison by the Cuban government provided “critical assistance” to United States agencies in exposing Cuban agents who had infiltrated the U.S. government, the U.S. Director of National Intelligence’s office said on Wednesday. The informant, whose identity U.S. officials declined ...

France is moving troops toward the Libyan border within weeks and, along with U.S. intelligence, is monitoring al-Qaida arms shipments to Africa’s Sahel region, a top French military official said Thursday. A French base will go up within weeks in a desert outpost 100 ...

President Barack Obama is acknowledging that U.S. intelligence agencies underestimated the threat from Islamic State militants in the Middle East and overestimated the ability and will of Iraq’s army to fight such extremists. Obama described the U.S. intelligence assessments in response to a question ...

Malaysian flight MH17 may have been shot down by “mistake” by ill-trained pro-Russian separatists, U.S. intelligence officials said Tuesday, while dismissing Moscow’s accounts of the incident. Evidence gathered so far suggests separatists launched the SA-11 surface-to-air missile that blew up the Malaysian airliner, but ...

U.S. intelligence officials were expected to present data Tuesday backing up the theory that pro-Russian rebels were responsible for the downing of flight MH17 over eastern Ukraine. The Malaysia Airlines Boeing 777 was blown out of the sky on July 17 by what is ...

Americans are learning what electronics whizzes and hackers have known all along — that computers and smartphones, which make our lives more productive and entertaining, have at the same time ended privacy as most of us have understood it. Every e-mail, cellphone call, transferred ...

Among defense contractors, QinetiQ North America is known for spy-world connections and an eye-popping product line. Its contributions to national security include secret satellites, drones and software used by U.S. special forces in Afghanistan and the Middle East. Former CIA Director George Tenet was ...